1.6 : Types of Search Engines and list of top search engines


Several types of Search Engines :

There are several types of search engines which are listed below :-

  1. Crawlers
  2. Directories
  3. Hybrids
  4. Meta
  • Crawlers :-

Crawler types of search engines will uses “spider” or a “crawler” to search the Internet web pages.  The spider digs through individual web pages, pulls out keywords in the content and then adds the pages to the search engine’s database.

Example :-  Google and Yahoo are examples for the crawler based search engines.


  • Directories :-

Directories are the “human powered search engines”.  websites are submitted to the directory and will be approved after reviewing the site or webpage completely.

Example :-  “Open Directory Project” and “the Internet Public Library” are examples for the directories based search engines.


  • Hybrids :-

Hybrids are a mix of directories and crawlers. Sometimes, you have a choice when you search whether to search the directory or a Web.  sometimes, you may receive both human powered results and crawler results for the same search.  In this case, the human results are usually listed first.


  • Meta :-

Meta search engines are one that search several other search engines at a time and combines all the results into a single list. When you get more results with meta search engines, the relevancy and quality of the results may sometimes suffer.

Example :- Dogpile and Clusty are examples of meta search engines


Top list of Search engines used

Here the list of top most search engines are listed below :-

  1. Google : Crawler-based search engine
  2. Bing : Crawler-based search engine
  3. Yahoo : It is Human-Powered Directory, also provides crawler-based search results which is powered by Google
  4. Baidu : Crawler-based search engine Chinese search engine
  5. AOL : Provides crawler-based search results powered by Google
  6. ASK : Provides crawler-based search results powered by Teoma


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